# Video to MP3 converter: save the sound of any video as MP3

> Convert video to MP3 in your browser. Save the sound of an MP4, MOV, WebM or MKV as an MP3 for a podcast, a voiceover or a song draft. Nothing is uploaded.

URL: https://cutfac.com/tools/video-to-mp3  
Last updated: 2026-10-28  
Language: [한국어](https://cutfac.com/ko/tools/video-to-mp3)

Drop in a video file in any common format and save its sound as an MP3. Everything happens in your browser, so the video never leaves your computer.

Runs in your browser. Nothing is uploaded.

## How to use it

1. **Add a video.** MP4, MOV, WebM, MKV: any file your browser can read, with a sound track.
2. **Pick a bitrate.** 128 kbps for speech, 192 kbps for music and mixes, 320 kbps for the highest MP3 quality.
3. **Convert and download.** Check the MP3 in the player, then download it.

## What's inside each kind of video

The video's format decides what audio you start from. The MP3 is encoded from that, so it helps to know:

- MP4 and MOV from phones, cameras and editors: usually AAC.
- WebM, from browser recordings and many web tools: usually Opus.
- MKV: whatever the maker chose, often AAC or Opus. Codecs a browser can't decode, such as AC-3 or DTS in some MKV files, won't convert here; use ffmpeg instead.
- A video with no sound track, such as a screen recording made without a microphone, has nothing to convert. The tool tells you so.

## Ways creators use it

- Turn a recorded talk, stream or video call into a podcast episode or a file to transcribe.
- Pull a voiceover you recorded on camera to re-use under a different edit.
- Keep a melody you hummed or played into your phone's camera as a song draft.

## With ffmpeg

For a folder of videos or a long file, ffmpeg does the same. -q:a 2 asks LAME for variable bitrate, about 190 kbps on average for music:

- ffmpeg -i input.webm -vn -c:a libmp3lame -q:a 2 audio.mp3
- ffmpeg -i input.mp4 -vn -c:a libmp3lame -b:a 192k audio.mp3

## Sources

- [FFmpeg wiki: Encode MP3](https://trac.ffmpeg.org/wiki/Encode/MP3)
- [LAME MP3 encoder](https://lame.sourceforge.io/)

## Questions

### Is my video uploaded?

No. Your browser reads the video and encodes the MP3 itself, with the LAME encoder running on your computer. Nothing is sent anywhere.

### Can I convert a YouTube or TikTok link?

No. The tool works on video files on your computer. It doesn't download anything from YouTube, TikTok or other sites.

### Which formats work?

MP4, MOV, WebM and MKV whose audio your browser can decode, which covers AAC, Opus, Vorbis and MP3. If a file fails, try Chrome, which decodes the most formats.

### How big will the MP3 be?

It depends only on length and bitrate: about 1.0 MB a minute at 128 kbps, 1.4 MB at 192 kbps and 2.4 MB at 320 kbps.